Angular2 / Angular-cli：将本地项目更新为Angular 4的问题

Question

I am trying to update an angular-cli/angular 2 project to Angular 4 I updated my package.json with all required angular4 modules and everything seems to go well untill I run the app. When I run the app I get the following error:

Error:

Unable to read property "provide" of undefined.

i've tried everything i can think of: I deleted node_modules and re installed with npm install but still getting the same error... Any idea what could be going wrong here/what I can try to resolve this? i'm using angular-cli 1.0.0.rc-1

my package.json:

{
  "name": "Retail-Mobile",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve --proxy-config proxy.conf.json",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^4.0.0",
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/compiler-cli": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/platform-server": "^4.0.0",
    "@angular/router": "^4.0.0",
    "core-js": "^2.4.1",
    "moment": "^2.17.1",
    "ng2-toastr": "^4.0.1",
    "rxjs": "^5.1.0",
    "typescript": "^2.2.1",
    "zone.js": "^0.8.5"
  },
  "devDependencies": {
    "@angular/cli": "1.0.0-rc.2",
    "@types/jasmine": "2.5.38",
    "@types/node": "~6.0.60",
    "bootstrap": "3.3.7",
    "codelyzer": "~2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "jquery": "3.1.1",
    "karma": "~1.4.1",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "tslint": "~4.5.0"
  }
}

Answer 1

Turns out the issue was me forgetting to add a ; at the end of the ng2-toastr import statement... I'm surprised that angular-cli gave me such a vague unhelpful error...